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BS7671 Amendment 2. Off-peak E7 consumer unit RCD and SPD.

Sparkingchip

Two new consumer units, peak and off-peak each remote from the intake with seventeen metre SWA distribution circuits.

The peak consumer unit will have Type A RCDs and a Surge Protection Device, is the off-peak consumer unit okay with a Type AC RCD and does it need another Surge Protection Device?

Andy.

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    The tack that seems to be taken re the SPDs is that providing the client is made fully aware of the implications of omitting them, then they are treated almost like an optional extra. In other words, not safety critical. The AC RCD is falling from favour for good reason. Whether it is required in the circumstances you describe, I do not know, but I would err on the side of prudent design and go with a type A.

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    The tack that seems to be taken re the SPDs is that providing the client is made fully aware of the implications of omitting them, then they are treated almost like an optional extra. In other words, not safety critical. The AC RCD is falling from favour for good reason. Whether it is required in the circumstances you describe, I do not know, but I would err on the side of prudent design and go with a type A.

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